<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text">
<input type="button" value="帅哥" onclick="f(1)">
<input type="button" value="美女" onclick="f(2)">
<hr>
<script>
    let input = document.querySelector("input");
  function f(x) {
      for (let i = 0; i < input.value; i++) {
          let url = x==1?"a.jpg":"b.jpg";
          let img = document.createElement("img");
          img.src = url;
          document.body.append(img);
      }
  }
</script>

</body>
</html>